linux: make Image{,.gz} format available for aarch64 BE
Just like aarch64, aarch64 BE supports the Image and Image.gz format.
Signed-off-by: Rémi Duraffort <remi.duraffort@linaro.org>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit d1579589e0a7d1870aa0ad587acd78f799f31257)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>